Big Oil finds more to love in deepwater exploration fields

As Big Oil returns this week to the industry's annual showcase for offshore energy projects and equipment in Houston, deepwater discoveries off Guyana, Namibia and the US Gulf Coast will take the spotlight. Offshore exploration had dimmed after the US shale boom ushered in new and cheaper-to-tap supplies of oil, and as past offshore cost overruns pushed deepwater projects onto the industry's backburner.